Broadband integrated optical proximity coupler

Details Broadband integrated optical proximity coupler Broadband integrated optical proximity coupler

G - Physics

02

B

G02B 6/28 (2006.01) G02B 6/125 (2006.01) G02F 1/313 (2006.01)

Patent

CA 2141379

An integrated optical proximity coupler comprises first and second parallel straight interaction waveguide segments. First and second end segments are connected to the input ends of the first and second straight waveguide segments, respectively, by means including first and second curved segments, respectively. The end segments are both the same predetermined size which is determined by conventional optical fibers to which they are to be connected. To make the device broad banded, one of the straight segments must be narrower than the other. To reduce device excess loss, the first straight segment and at least part of its respective curved segment are made slightly narrower than the end segments, and the second straight segment and at least part of its respective curved segment are made slightly wider than the end segments. Thus, the required .DELTA..beta. can be obtained without making the narrow path too narrow.

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